Do you want to pass your SPI-US-Physics – I can help you

Do you want to pass your SPI-US-Physics – I can help you

  1.   For those who are writing the SPI- Ultrasound physics exam. I have notes for sale it is about 1800 multiple choices sets for ARDMS -spi exam = 50 USA DOLLARS. I study those notes and passed my exam 670/700 . If you want to buy them , I can send you the notes by e mail or by mail you can reach me at drsteveramsey@gmail.com . I will also include some of the ideas about the 12 simulation questions. ​T​he payment with ​ PayPal     to drsteveramsey@gmail.com ​ , fetal gender , Saad Ismail  
  2. I also have Cardio file 1200 questions and answers, RVT- Vascular file more than 1200 questions and answers, and ( abd , gyn OBS file ) more than 1500 mc questions and answers .I am preparing the MSK file soon.

————————————————————————————————-Ultrasound Image Quality; how to get a better imaging.

Higher frequency = higher spatial resolution but less depth of penetration

lower frequency = greater depth of penetration but lower spatial resolution

Generally speaking these sentences are correct,

Resolution in ultrasound imaging defined in two orthogonal directions, in the direction of wave propagation (axial resolution) and in the direction perpendicular to this direction (lateral resolution){I am considering 2D imaging}

Axial resolution depends on frequency, pulse duration, sampling frequency.

Lateral resolution depends on frequency, transducer geometry and size, the used technique for beam forming, line number of every frame.

 Remember that most efficient adjustments in the ultrasound machine are the Depth / zoom, Focus, and the Q-scan or the smart knob, remember that focal position is most effective in the middle of what you are trying to image, and not below or above the structure.Remember to use FOV – field of view scan range especially when you do the EV scan.

– Q-scan, smart knob can be used to optimize the machine overall / lateral gain / depth dependent gain .Always update the Q-Scan knob when you need to adjust the gain it is very useful to all linear probes Ev probes, and abdominal. If you double click the Q-scan quickly this will remove all gain corrections, and also will adjust the scale and base line in the PW mode after one or 2 beats.

-Remember that for 2D-DR/Dynamic range lower number gives a higher contrast, and higher number gives a lower contrast and you look at an area you have to adjust manually.

-Precision Imaging; it is a fundamental signal processing before the Image is written (pre) not post processing. It will improves the visualization of tissues by recognizing structural boundary and reducing random noise giving a cleaner, sharper, more homogenous  image , there are 4 or 5 levels depends on your ultrasound machine .

-Compound imaging can be in your machine under different name at high level you will get better definition of margins , it is so good for a hypo echoic areas, there are many levels up to 8 or more . The higher the level applied the more compounding is performed in the image. The lower level 1 to 3 are the level where frequency and spatial receive compounding, level 4 and above are the spatial transmit compounding.

-Speckle Reduction; it is a post processing filter that removes speckle noise, to sharpen borders and clear cystic areas.

– For color flow always select the ADF the advance Dynamic Flow it is great for demonstrating color information accurately, it is good for filling adjacent vessels , OB and renal  ,testes and thyroid scan

-For color use angio power color for endometrial / uterus and breast exams. USE ADF for kidneys, OB, and Neuro exams.

-Use HF CONVEX Setting for superficial liver or the gallbladder. And use Q SCAN, Intelligent scans for Endovag us.

-For leg dvt scan of large patient switch to 10 c3 curve probe OR 5 MHZ and use Q SCAN.

-CLIP STORING IS MOSTLY 5-7 Seconds to adjust the length of the clip select the PIMS at the touch screen and adjust the number of seconds on the dial.

 – If your ultrasound system freeze or locks up, Press OTHER on the touch screen, press IQ report. If it doesn’t work you have to reboot the machine.

– Select the Appropriate probe:

Going deep or need to get through a lot of soft tissue such as fat or dense muscle? Choose a convex probe Need high definition or imaging superficial areas or tendons? Select your Linear Probe

– Frame your image

before starting any other imaging optimisation or playing with any other settings, get the area of interest as large as possible on your screen (allowing for small movements such as a muscle contraction”. Most machines will have a depth button to achieve this function- either by increasing or decreasing the depth.

Of equal importance is the probe positioning and placement. It is better to place the probe where you think it should be to acquire the image and then rock the probe heel toe and side to side, rather than sweeping the probe around an area as small changes in angle may be all that is required to find the best image.

Adjust the brightness

Most machines refer to the brightness control as “Gain”. If the image appears too dark you will not see all the fine detail required for accurate interpretation and you will need to decrease the gain. Likewise if the gain is turned too high, the image will appear washed out and it will be difficult to differentiate between structures, so turn the gain down to the appropriate level

“Focus” the image

Many machines will allow you to choose a focus point or focus points. These essentially select the area that the ultrasound beam will narrow in and focus on. Position your focus points at the level of the screen that is of most interest to you.

– Select the appropriate frequency

most probes are multi frequency and can be adjusted using the “frequency” button. As a general rule, the higher the frequency, the more detailed the image will be, while the lower the frequency, the more penetration can be achieved.

If your image is not clear enough or detailed enough, try increasing the frequency. If your machine is not getting enough penetration or is not bright enough try decreasing the frequency.

 Thank you for reading.

 Steve Ramsey , PhD. Calgary- Alberta , Canada. 

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